<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.hoenzb
{mso-style-name:hoenzb;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Yes,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>That’s the sort of approach. At the moment I can record with WMA although I do see a demand for recording with a format as described below, so I’ll have to write my own player (Windows only).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Simon G4ELI/HB9DRV<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>http://v2.sdr-radio.com/<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Benjamin Schwartz [mailto:benjamin.m.schwartz@gmail.com] <br><b>Sent:</b> 27 February 2013 08:11<br><b>To:</b> Ian Malone<br><b>Cc:</b> Simon G4ELI/HB9DRV; opus@xiph.org<br><b>Subject:</b> Re: [opus] Opus File Format<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>If I were doing this, I would make each frequency switch a "chain boundary". This is analogous to having the overall stream actually be a playlist of consecutive streams, each representing one segment in which the radio channel was constant. Then each segment can easily be tagged with the frequency of the channel. You can do this using Ogg Vorbis or Ogg Opus today.<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Tue, Feb 26, 2013 at 9:33 AM, Ian Malone <<a href="mailto:ibmalone@gmail.com" target="_blank">ibmalone@gmail.com</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal>On 26 February 2013 12:50, Simon G4ELI/HB9DRV <<a href="mailto:simon@sdr-radio.com">simon@sdr-radio.com</a>> wrote:<br><br>>> I don't know whether Opus can continually vary frequency (though I don't think so, it's very rare for<br>>> audio formats), but communicating that is obviously something the codec would need to specify.<br><br>><o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>> Sorry - I wasn't clear, what I would like to do with any future Opus file format is have a tag such as Title which can be continually updated throughout the recording, not fixed at the start. Obviously I could design my own storage format for this, but it always makes sense to 'go with the flow' so to speak.<br>><br>> In my case these are radio recordings, so I would add my own custom tag 'Radio Frequency' and update this as the user changes the radio's frequency.<br>><o:p></o:p></p></div><p class=MsoNormal>Ah, I completely misunderstood that example then. I've never tried it,<br>but Kate should be able to do that as metadata:<br><a href="http://wiki.xiph.org/Kate#Metadata" target="_blank">http://wiki.xiph.org/Kate#Metadata</a> particularly you can apply it to a<br>time range, which is probably what you want when tagging something<br>like radio frequency rather than an instantaneous label.<br><span style='color:#888888'><br><span class=hoenzb>--</span><br><span class=hoenzb>imalone</span><br><span class=hoenzb><a href="http://ibmalone.blogspot.co.uk" target="_blank">http://ibmalone.blogspot.co.uk</a></span></span><o:p></o:p></p><div><div><p class=MsoNormal>_______________________________________________<br>opus mailing list<br><a href="mailto:opus@xiph.org">opus@xiph.org</a><br><a href="http://lists.xiph.org/mailman/listinfo/opus" target="_blank">http://lists.xiph.org/mailman/listinfo/opus</a><o:p></o:p></p></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>